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CVE-2026-74908— Grav plugin-api before 1.0.15 Script Injection via SVG

Quick assessment

Affected
getgrav grav
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Grav是Grav组织开源的一款基于文件的扁平化内容管理系统。 Grav 1.0.15之前版本存在跨站脚本漏洞，该漏洞源于SVG清理器仅检查精确扩展名'svg'，导致.svgz和.xhtml文件绕过清理并被存储未清理，攻击者可通过api.media.write权限上传包含可执行脚本的文件，当管理员或访问者访问时在站点源中执行脚本。

CVSS 4.6 · Medium EPSS 0.18% · P8

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 1.0.15 affected
1.0.15 unaffected
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I. Basic Information for CVE-2026-74908

Vulnerability Information
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Vulnerability Title
Grav plugin-api before 1.0.15 Script Injection via SVG
Source: CVE Program / CVE List V5
Vulnerability Description
Grav plugin-api before 1.0.15 contains a script injection vulnerability where the SVG sanitizer only checks for the exact extension 'svg', allowing .svgz and .xhtml files to bypass sanitization and be stored unsanitized. Attackers with api.media.write permission can upload files containing executable script payloads that execute in the site origin when accessed by administrators or visitors.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grav是Grav组织开源的一款基于文件的扁平化内容管理系统。 Grav 1.0.15之前版本存在跨站脚本漏洞，该漏洞源于SVG清理器仅检查精确扩展名'svg'，导致.svgz和.xhtml文件绕过清理并被存储未清理，攻击者可通过api.media.write权限上传包含可执行脚本的文件，当管理员或访问者访问时在站点源中执行脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav 0 ~ 1.0.15 -

II. Public POCs for CVE-2026-74908

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III. Intelligence Information for CVE-2026-74908

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Vendor Advisories for CVE-2026-74908 (2)

Same Patch Batch · getgrav · 2026-08-18 · 14 CVEs total

CVE-2026-75837 9.1 CRITICAL Grav before 2.0.14 Privilege Escalation via Group Access Field
CVE-2026-75836 8.8 HIGH Grav API Plugin before 1.0.14 Missing Authorization
CVE-2026-75827 8.8 HIGH Grav before 2.0.15 Arbitrary File Write via error_log
CVE-2026-75828 8.7 HIGH Grav before 2.0.15 Stored XSS via detectXss() Quote Bypass
CVE-2026-75829 8.1 HIGH grav-plugin-api before 1.0.15 Twig SSTI via translate endpoint
CVE-2026-75831 7.6 HIGH Grav before 2.0.15 Stored XSS via audio/video source URL
CVE-2026-75830 7.1 HIGH grav-plugin-api before 1.0.15 Path Traversal via batchCopy
CVE-2026-74907 5.9 MEDIUM Grav before 2.0.15 Path Traversal via plugin-asset-map.php
CVE-2026-75107 5.4 MEDIUM Grav Form Plugin before 9.1.19 Stored XSS via Field Properties
CVE-2026-75834 5.4 MEDIUM Grav before 2.0.14 Stored XSS via Invalid UTF-8 Byte
CVE-2026-75832 4.3 MEDIUM Grav API Plugin before 1.0.14 Authorization Bypass
CVE-2026-75835 4.3 MEDIUM Grav API Plugin before 1.0.14 Missing Authorization
CVE-2026-75833 4.2 MEDIUM Grav API Plugin Open Redirect via Backslash Bypass

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-79

V. Comments for CVE-2026-74908

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